Very weak magnetic fields are detected by___________________?
Correct answer: A. Squids
- A. Squids
- B. Magnetic resonance imaging (MRI)
- C. Magnetometer
- D. Oscilloscope
Explanation
SQUIDs, or superconducting quantum interference devices, detect extremely small changes in magnetic flux and are therefore used for very weak magnetic fields. A magnetometer is a likely choice because it measures magnetic fields, but ordinary magnetometers are generally less sensitive than SQUIDs.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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